phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table '.\head_f\phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4f4a647f2ef4a08462dade2010f5c389', -1, 1467013564, 1467013564, '365124e4', -4, 0, 0)

Line : 187
File : sessions.php